Optical glass and optical element

A technology of optical glass and optical components, applied in optical components, optics, instruments, etc., can solve the problems of poor chemical stability of glass

Inactive Publication Date: 2011-09-28
CDGM OPTICAL GLASS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the content of more than 45wt% B 2 o 3 The chemical stability of the glass is poor. In addition, in order to obtain ideal optical

Method used

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  • Optical glass and optical element
  • Optical glass and optical element
  • Optical glass and optical element

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0054] The method for preparing the optical glass provided by the present invention is not particularly limited, and it is prepared according to a method well known to those skilled in the art. The raw materials are melted, clarified, homogenized, cooled and molded to obtain optical glass.

[0055] The performance parameters of the optical glass provided by the present invention are tested according to the following methods.

[0056] Wherein the refractive index (nd) value is (-2℃ / h)-(-6℃ / h) annealing value, the refractive index and Abbe number are in accordance with "GB / T 7962.1-1987 colorless optical glass test method refractive index and Dispersion coefficient" test.

[0057] Transition temperature (Tg) is tested in accordance with "GB / T7962.16-1987 Test Method for Colorless Optical Glass Linear Expansion Coefficient, Transition Temperature, and Relaxation Temperature", that is: within a certain temperature range, the temperature of the tested sample increases by 1 ℃, on the exp...

Example Embodiment

[0075] The high temperature viscosity of the optical glass prepared in Example 1 is shown in Table 3.

[0076] Table 3 High temperature viscosity of the optical glass provided in Example 1

[0077]

[0078] It can be seen from the foregoing embodiments that the optical glass provided in the embodiments of the present invention does not need to add non-environmentally friendly elements. Experimental results show that the refractive index of the optical glass provided by the present invention is 1.59 to 1.63, and the Abbe number is 42 to 47, which meets the needs of modern imaging equipment.

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Abstract

The invention discloses an optical glass, comprising the following components: 40wt%-55wt% of SiO2, 5wt%-20wt% of B2O3, 13wt%-25wt% of Nb2O5, 3wt%-20wt% of R2O, 0-5wt% of WO3, 0-10wt% of ZrO2, 0-5wt% of BaO, and 0-0.5wt% of Sb2O3, wherein the R2O includes one or a plurality of components selected from a group of Na2O, K2O and Li2O. The optical glass provided by the invention does not need to be added with non-green elements. Experiment results show that the optical glass provided by the invention has a refractive index of 1.59-1.63, an abbe number of 42-47, which satisfies requirements of modern imaging equipment.

Description

technical field [0001] The invention relates to the technical field of glass, more specifically, to an optical glass and an optical element. Background technique [0002] Optical glass is a glass material used to manufacture lenses, prisms, mirrors and windows in optical instruments or mechanical systems. Optical glass has good light transmission performance and high refractive index, and is widely used in the manufacture of optical instruments such as spectacle lenses, cameras, digital cameras, telescopes, microscopes and lenses. In recent years, with the increasing popularity of digital cameras and digital video cameras, not only the demand for optical glass continues to expand, but also higher requirements are placed on the performance of optical glass. For example, in order to satisfy the performance of the apochromatic and super-apochromatic optical systems, the residual chromatic aberration of the optical system is required to be small in a wide wavelength range. [...

Claims

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Application Information

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IPC IPC(8): C03C3/097G02B1/00
Inventor 孙伟
Owner CDGM OPTICAL GLASS
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